MVP of the application (#1)

* Created fixture for binary row parser that maps data directly into columns
* Add full delete rows
* Introduce BinaryTable abstraction to make to remove mess from rows parsing
* Introduce abstraction over binary log table map
* Table map event is not converted into BinaryTable struct to simplify parsing of bin row.
* Added working parsing logic for write rows event without null values
* Implement row parsing algorithm
* Concept of EventObservers, implemented configurable entity observer
* Make macros better organized
* Move table match into combinator for EventObserver trait and make entity observer product specific
* Separate log recording into trait to decide later how communicatino is going to happen
* Code cleanup
* Move observer and event into replication, move product observers into own module path
* Add product EAV attribute default configuration
* Make macros properly exported
* Small refactor of collectors
* Introduce changelog output
    - Make output tested and configurable
    - Introduce JSON format for human readable form
    - Introduce MessagePack for compact and fast readable binary representation

* Application skeleton
* Code cleanup with cargo fixer
* Make aggregate variation that writes directly to I/O.
* Update documentation, run cargo fix and update changelog

Author: IvanChepurnyi

BRAINSTORM.md

@@ -8,6 +8,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 ### Added
-- Added `ReplicationReader` to attach to binlog stream and process events into `ReplicationObserver`
+- `Database` as a building block for connection management in application.
+- `schema::TableSchema` for mapping binary row into actual column names
+- `replication::BinaryRow` and `replication::BinaryRowIter` for making working with rows based binary events easier to work with
+- `replication::Event` to make easier processing of similar table changes
+- `mapper::ChangeLogMapper` to transform `replication::Event` into business domain change item
+- `log::ItemChange` to store multiple domain model specific changes in an enum
+- `aggregate::Aggregate` and `aggregate::AsyncAggregate` to process `log::ItemChange` in batches and product output of `aggregate::ChangeAggregate`
+- `app::Application` to build easily your own changelog customized apps
 
 [unreleased]: https://github.com/EcomDev/mage-os-database-changelog/compare/0a7c672...HEAD